diff options
| -rw-r--r-- | drivers/serial/atmel_serial.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 6aeef22bd20..c17fcd6085f 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -956,6 +956,20 @@ static void atmel_shutdown(struct uart_port *port) } /* + * Flush any TX data submitted for DMA. Called when the TX circular + * buffer is reset. + */ +static void atmel_flush_buffer(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + if (atmel_use_dma_tx(port)) { + UART_PUT_TCR(port, 0); + atmel_port->pdc_tx.ofs = 0; + } +} + +/* * Power / Clock management. */ static void atmel_serial_pm(struct uart_port *port, unsigned int state, @@ -1189,6 +1203,7 @@ static struct uart_ops atmel_pops = { .break_ctl = atmel_break_ctl, .startup = atmel_startup, .shutdown = atmel_shutdown, + .flush_buffer = atmel_flush_buffer, .set_termios = atmel_set_termios, .type = atmel_type, .release_port = atmel_release_port, |